Backend software engineer Jobs in Berlin

At TechBiz Global, we are providing recruitment service to our TOP clients from our portfolio. We are currently seeking a Founding Backend Engineer(Go) to join one of our clients' team in Berlin. If you're looking for an exciting opportunity to grow in a innovative environment, this could be the perfect fit for you.

Key Responsibilities:

• Develop and maintain backend applications using Go

• Design and optimize cloud-based solutions using AWS services (EC2, Lambda, S3, SQS, SNS, etc.)

• Design, use and manage databases, including PostgreSQL, Neo4J, Redis, and Elasticsearch

• Develop, manage, and optimize containerized applications using Docker

• Automate processes using Bash/Python scripting

• Optimize and maintain RESTful APIs, ensuring security and performance

• Work closely with frontend engineers, DevOps, and product team to deliver robust applications

• Monitor, debug, and improve backend performance, reliability, and scalability

• Implement caching, messaging queues, and event-driven architectures where needed

• Build whole platform from scratch

• 5+ years of GoLang experience

• Hands-on coding mentality; can build things from scratch and familiar with different architectures

• Hands-on experience with Docker, Kubernetes (EKS) and containerized workloads

• Experience designing RESTful and gRPC APIs and using frameworks like Gin

• Hands-on experience with messaging systems (e.g., SQS, Kafka)

• Experience with CI/CD pipelines (GitHub Actions or similar)

• Experience operating PostgreSQL (RDS / Aurora), Neo4J(or similar)

• Experience with AI agents, LLM-based systems, MCP, RAG, Prompts, Embeddings, Vector, etc

• Experience with AI stack(AWS Bedrock, LangChain, pgvector or similar)

• Experience with Infrastructure as Code (Terraform)

• Experience with monitoring, logging, observability (Grafana, OpenTelemetry, Prometheus)

• Ability to troubleshoot production issues end to end

• Experience with Coding CoPilots(Claude Code, GitHub Copilot, AWS CodeWhisperer, Codex, etc.)

• Experience supporting production SaaS platforms

• Strong understanding of SaaS integrations and app-to-app permission flows

• High ownership mentality, startup mindset, and ability to move quickly

• Experience in startup or scale-up environments

• Low ego, high commitment, and a true tech startup mentality

• Strong problem-solving skills and ability to work in a collaborative environment

• Excellent English communication skills

Nice-to-have requirements:

• Experience working with Java

• Ability to code in Python

• Experience with security architecture, identity security, or security engineering

• Familiarity with compliance frameworks (NIS2, DORA, ISO 27001, SOC 2)

• Experience with AWS in production environments

• Exposure to graph-based modeling (identity graph, access graph, risk graph)

• Familiarity with compliance frameworks (NIS2, DORA, ISO 27001, SOC 2)

• Understanding of OAuth/OIDC, API tokens, IdP, scopes, SSO, SCIM, roles, RBAC/ABAC, service accounts

• Familiarity with cloud identity and security controls (e.g. IAM, CloudTrail, Azure Active Directory / Entra ID)

• Hands-on with SIEM platforms such as Splunk, Microsoft Sentinel, or IBM QRadar

• Experience designing permission models, identity graphs, or access control frameworks

• Knowledge of tokenization, Zero Trust principles, least privilege, and continuous verification

• Experience with Security related to AI/LLM systems, agent logic, or willingness to learn fast

• Familiarity with AI agent behavior, LLM security, or agent sandboxing

• Previous experience in cybersecurity, identity startups

• You are a fan of rock or metal music

• Excellent German communication skills

Benefits:

• Founding Team Member Equity — ESOPs in a cybersecurity company

• Competitive Compensation — salary aligned with market, flexible early-stage arrangements possible

• Founding Team Member Status — shape the company from day one and own critical technical decisions

• Fresh Funding Secured — immediate runway to build, hire, and execute fast

• Security Contribution — contribute to security architecture across identity, AI agents, and enforcement

• High Autonomy — freedom to design and build without corporate overhead

• Work with a Technical CEO and CPTO — fast iteration, strong alignment, clear direction

• Cutting-Edge Domain — identity security, SaaS-to-SaaS access, AI agent governance

• Massive Learning Curve — quickly gain depth in cybersecurity, identity, and AI systems

• Fast Career Path — opportunity evolve into leadership as we scale the engineering team

• Berlin Location — top-tier tech environment with strong cybersecurity and AI ecosystems

• Direct Impact — your architecture and code become the foundation of the entire platform

• Best Equipment and Tools - High quality equipment and modern tools to help you do your best work from day one

• Team Offsites - Regular team offsites designed to build strong connections, alignment, and shared momentum